Rockwell Automation 865 Differential Protection Relay - Manual (Page 91)

Protection Functions 3-47
865-UM001A-EN-P – July 2009
Inverse Time Setting Error Signal
The inverse time setting error signal will be activated, if interpolation
with the given points fails. See section “Inverse Time Operation” for
more details.
Limitations
The minimum definite time delay start latest, when the measured
value is twenty times the setting. However, there are limitations at
high setting values due to the measurement range. See section
“Inverse Time Operation” in Chapter 2 for more details.